A 13-year-old who authorities say fatally beat his 16-month-old cousin after the girl's mother left them home alone is expected to get a competency examination.

The boy is charged with an open count of murder in the Feb. 28 death of A'Laina Brown at the girl's home in Muskegon Township. Authorities say the Muskegon Heights teen told police he shoved A'Laina, kicked her hard and struck her head.

The Associated Press isn't naming him because of his age.

The Muskegon Chronicle reports public defender David Kortering requested the review of mental competency and sanity.

Mental competency involves whether a defendant is capable of understanding court proceedings and assisting in a defense. Legal sanity, also called criminal responsibility, is whether the boy was responsible for his own actions at the time.